Free Printable Biological Molecules (Water)

Worksheets

Biological Molecules (Water)

Total questions: 14

Worksheet time: 7mins

Name

Class

Date

The movement of water through the vascular tissue of plants relies on which property of water?

changes in density with temperature

good solvent for ions and polar molecules

high specific heat capacity

strong cohesive forces between molecules

Which features of water is least likely to affect the life of an animal in a tropical rain forest?

adhesion with other molecules

cohesion between water molecules

low viscosity

maximum density of water at 4oC

which bond is responsible for the important benefits that water contributes to life?

covalent bond

disulphide bonds

hydrogen bonds

Van der Waals bonds

which properties of water are a result of only cohesion? (1) the water has a high surface tension (2) water moves up the xylem vessels (3) water is an excellent solvent

1,2 and 3

1 and 2 only

1 only

3 only

Which of the following reactions requires water? (1) condensation (2) hydrolysis (3) polymerisation

1 and 2 only

1,2 and 3

2 and 3 only

2 only

Which of the following is not a role played by water in plant cells (1)It serves as raw material for photosynthesis (2) it serves as raw material for protein synthesis (3) it is necessary for the transport of materials down the phloem (4) it is necessary for the transport of materials down the xylem

2 and 4 only

1,2,3 and 4

1 and 3 only

1, 3 and 4 only

Which of the following explains why glucose readily dissolves in water whereas starch does not

glucose readily forms dipole dipole interaction with water molecules

glucose readily forms hydrogen bonds with water molecules

glucose readily reacts with water to produce ATP

glucose readily reacts with each other to form starch

What percentage of the average human bone is constituted by water?

0.6

0.8

0.2

0.005

Water readily forms ………………..with ions and ……………………..with polar molecules

hydrogen bonds, dipole interactions

dipole interactions, hydrogen bonds

covalent interactions, hydrogen bonds

hydrogen bonds, covalent interactions

10.

When fructose dissolves in water, the hydrogen bonds formed are between ………………..

hydrogen of fructose and hydrogen of water

hydrogen of fructose and oxygen of water

oxygen of fructose and oxygen of water

carbon of fructose and hydrogen of water

11.

Many insects can walk on water surface because of ……………..

high surface tension of ice

high specific heat capacity

strong adhesive forces between water and the feet of the insect

strong cohesive forces between water molecules

12.

Which of the following will have the lowest solubility in water?

glucose

amylose

amylopectin

fructose

13.

Why does ice float on water?

ice is more dense than water

water is more dense than ice

ice is solid, water is liquid

ice has higher latent heat of vaporisation

14.

water accounts for ……………………..

the turgidity of erythrocytes

the turgidity of mesophyl cells

the turgidity of xylem vessel elements

the turgidity of stomatal pores

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Biological Molecules (Water)

Total questions: 14

Worksheet time: 7mins

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